This has to be one of the first three questions we get asked all day every day. Simple answer in Australia is 9 out of the top 10 phones sold in Australia today have NFC on board. Obviously all except the iPhone.
If you want a more detailed answer the most current list we have found is this one here from NFCworld.com: List of NFC enabled phones.
And another more readily scanned list is the one on Wikipedia, not as current, but easier to scan quickly to see if your handset: Check it out here.
Happy hunting for the right handset for your project, and be sure to confirm which versions of the NFC Forum Tag Types are best to work with. Not all of them play with all hardware.
If in doubt, don't be shy and ask!
NFC Wireless are NFC pioneers, having opened Australia's first online NFC store in early 2012. Supplying quality NFC tags is paramount at NFC Wireless. We are proud partners of Smartrac Technology - world leaders in NFC technology.